Rolling bearing device

Abstract

A rolling bearing device of the invention has inner rings, an outer ring, and a sealing unit having a seal case fixed to the outer ring. The seal case is internally fitted to an annular corner formed between a shoulder inner peripheral surface of the outer ring, and a seal groove in a state where the diameter of a fixed portion is reduced elastically, and is fixed to the outer ring in a state where the annular corner and an outer peripheral surface of the fixed portion are in a line contact with each other.

1. A rolling bearing device comprising:
 an inner ring; 
 an outer ring in which a seal groove extending along a peripheral direction is formed in a shoulder inner peripheral surface; 
 rolling elements disposed rollably between the inner and outer rings; and 
 a sealing unit that seals a gap between the inner and outer rings, the sealing unit including a tubular fixed portion that is fixedly inserted toward the shoulder inner peripheral surface of the outer ring, and a seal case having a holding portion that extends outward of the outer ring from the fixed portion, and holds a sealing member that seals the gap between the inner and outer rings axially outside an end face of the outer ring, 
 wherein the seal case is internally fitted to an annular corner formed between the shoulder inner peripheral surface of the outer ring, and the seal groove in a state where the diameter of the fixed portion is reduced elastically, and is fixed to the outer ring in a state where the annular corner and an outer peripheral surface of the fixed portion are in a line contact with each other. 
 
   
   
     2. The rolling bearing device according to  claim 1 ,
 wherein the outer peripheral surface of the fixed portion is a tapered surface whose diameter increases toward a tip of the fixed portion inserted toward the shoulder inner peripheral surface of the outer ring. 
 
   
   
     3. The rolling bearing device according to  claim 1 ,
 wherein the tip of the fixed portion is provided with a projection that protrudes radially outward, and is engaged with the seal groove provided in the inner peripheral surface of the outer ring.